add sample cron file and fix scheduler

scheduler/scheduler.go

@@ -102,6 +102,11 @@ func (s *Scheduler) Start() error {
 		}
 	}
 	s.cron.Start()
+	entries := s.cron.Entries()
+	logger.New().Info("started", len(entries), "jobs")
+	for _, entry := range entries {
+		logger.New().Info(fmt.Sprintf("%+v", entry))
+	}
 	return nil
 }